This week’s headlines: YouTube’s Google+ Comments Ignite Controversy, Twitter Launches Custom Timelines, Snapchat Turns Down Facebook Acquisition and Pinterest Launches Its First API.

The week’s news quick hits: Quora Adds Analytics for Contributors, MySpace Announces Layoffs, Vine Comes to Windows Phone, LinkedIn Fully Integrates Pulse, Amazon Adds Facebook Integration, Spotify Makes Social TV Play with Bravo, Twitter Expands Self-Serve Advertising and Facebook Updates Scheduling Posts.